PS267 Lecture Notes - Lecture 10: Visual Agnosia, Telepathy, Visual Cortex
Document Summary
Lecture 10 object recognition part 2: principles of object recognition, multiple pathways for visual perception, computational problems in object recognition, failures in object recognition, category specificity in agnosia, processing faces, mind reading. Not a memory problem, not a visual problem. Associated with right hemisphere lesions in the posterior area. Integrative agnosia = inability to integrate features into parts, or parts of an object into a coherent whole: ex. Patient copied the image on the left do not see 2 squares and a circle but rather as a whole item: ex. Patient recognizes a cat based on individual features (whiskers, tail, etc. : ex. Patient can copy a drawing perfectly but not know what it is: associative agnosia = failure in assigning meaning or understanding to objects perceived visually, have no meaning for objects, ex. Can"t decide what to use red items for, don"t know what they are/are used for.
